Home
Class 12
MATHS
If sec x + tan x =22/7 , find the value ...

If sec x + tan x =22/7 , find the value of tanx/2

A

the value of tan `(x)/(2)=(29)/(15)`

B

the value of tan `(x)/(2)=(29)/(15)`

C

the value of cosec x + cot `x=(29)/(15)`

D

thevalue of cosec x + cot `x=(15)/(29)`

Text Solution

Verified by Experts

The correct Answer is:
B, C

`sec x + tan x = (22)/(7)`
`rArr (1+sin x)/(cos x)=(22)/(7)`
`rArr (1+(2t)/(1+t^(2)))/((1-t^(2))/(1+t^(2)))=(22)/(7)`, where `t= tan.(x)/(2)`
`rArr ((1+t)^(2))/(1-t^(2))=(22)/(7)`
`rArr (1+t)/(1-t)=(22)/(7)`
`rArr t=(15)/(29)`
Now cosec x + cot x
`=(1+cos x)/(sin x)`
`=(2 cos^(2)(x//2))/(2sin(x//2)cos(x//2))`
`=cot((x)/(2))=(29)/(15)`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • TRIGONOMETRIC RATIOS FOR COMPOUND, MULTIPLE, SUB-MULTIPLE ANGLES, AND TRANSFORMATION FORMULAS

    CENGAGE|Exercise Multiple Correct Answers Type|6 Videos
  • TRIGONOMETRIC RATIOS AND TRANSFORMATION FORMULAS

    CENGAGE|Exercise Matrix Match Type|1 Videos
  • VECTOR ALGEBRA

    CENGAGE|Exercise Solved Examples And Exercises|519 Videos

Similar Questions

Explore conceptually related problems

If sec x+tan x=22/7, find the value of tan x/2

If sec x+tan x=(22)/(7) find the value of tan((x)/(2)) use it to deduce the value of cos ecx+cot x

If sec x+tan x=(22)/(7) find the value of tan((x)/(2)). use it to deduce the value of cos ecx+cot x

if sec A=2x and tan A=(2)/(x), find the value of 2(x^(2)-(1)/(x^(2)))

If tanx=b/a , find the value of (acos2x+bsin2x) .

If sec theta + tan theta =x, " find the value of " sec theta.

If sec x+tan x=3 then value of tan backslash(x)/(2) is

If tan x=(b)/(a) then find the value of a^(2)cos ec2x+b^(2)sec2x

If 7:x=175:22.5, then find the value of x

If 5x=sec theta and (5)/(x)=tan theta, find the value of 5(x^(2)-(1)/(x^(2)))